On 26/05/2015 4:34 AM, james wrote:
While reading the photography part on flipboard (Smart phone app) A guy
named Dzvonko Petrovski is talking about crop v full frame sensors.

Edited quote:
A 50mm F2 lens on full frame is as expected a 50mm F2. On a 1.5 crop
sensor, it is a 75mm F3.

Link here:
http://www.lightstalking.com/?s=camera+sensor+size


Huh???????? A lens gets darker on a crop sensor????


James

I was hoping the equivalence debate would never make it's way to the PDML.

The lens doesn't change, however you gain depth of field as the sensor gets smaller. The equivalence nimrods dwell on that number, completely ignoring that the maximum aperture of a lens is determined by the manufacturer, not the format it is put in front of.

Please direct further inquiries to DPReview. They have people there who have nothing better to do with their lives than make entire mountain ranges out of this molehill.

bill

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